Field-coil terminal connection.



PATENTED AUG. 13, 1907.

B. W. OLDS. FIELD GOIL'TERMINAL CONNECTION.

APPLIOATIONIILED 00T.18. 1905.

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EDWIN W. OLDS, MILWAUKEE. WISCONSIN, i SSIGNOR TO GENERAL ELECTRIC COMPANY,

A companion or NEW FIELD-CDIL TER'MLTI'XL CONNECTION.

Appli ation filed' C 18,l905. Serial No, 283,231.

' coil structure and are provided each with a socket into which the l)1l(l end of a lead from the coil in the form of a flexible, heavily insulated cable is inserted and secured by means oi clamping screws, solder, or both. "it th the vibr tion inherent in the operation of railway motors it has been found that the cables are apt to break at the point which they leave the terminals.

wing to the necessity for a simple and reliable con struction and the necessity of having the parts heavily insulated, it has been found difficult. to avoid this do fet. I have found, however, that this trouble may be avoided, if the body of the insulated cable forming the lead, is secured to or supported by a member which is in turn rigidly secured to the terminal.

The various features of novelty which characterize my invention are *OliltOtl out with particularity in the claims annexed to and forming a partoi this specitica t-ton, For a better understanding of my invention,

however, reference, may be had to the accompanying descriptive matter and drawings in which I have described and illustrated forms in which my invention i nibodied.

Of-thefldraw'ings, Figure l is an end elevation with parts broken away and in section of a railway motor embodying myinvention; Fig. 2 is an enlarged sectional elevation of a portion of one of the field coils of the motor; Fig. 3 is a perspective view of a terminal attached to its lead with the supporting device in place and with a portion of the tape removed; Fig. 4 is perspective view of the detachable supporting device employed, and Fig. 5 is aperspective view illustrating a modified construction.

1n the drawings, 1 represents the casing of a railway motor of a well known type. Around each of the internally projecting pole pieces 2 oi the motor is placed a field coil 3. In constructing a field it is Wound in a suitable form into substantially the shape shown, after which two terminal members t are secured in place. As shown, each terminal men'iber comprises a pair of similar wings or flanges 5 at right angles to each other. From one of the flanges 5 extends a neck at the outer end of which is a substantially cylindrical portion 6 provided with an axially extending socket 7. To one Specification of Letters Patent.

.over with soin'e suitable insi'i ol' the flanges is secured by r tension 2) of sheet copper or re ii'ec"en 'l of which is curled up to 1mm" I lll ltl wliii h one end of the conductor iorming the coil 3 is soldered. After the terminals are secured in place the coil is ordinarily immersed in some ii su l; I

not over the projection (l. ilTK solid body of which the terni When the tield coils thu place about the pole piece. lead lil is secured in each screws l l and usually also l M l3 is cov red with a heavy insulating which is cut away to ekpose the portion of the conductor inserted in the socket. Usually the insulating jacket of an external diameter substantially equal to the cylindrical portion 5.

To preventthe cable from being jarred oil at the point \Yll ere i t leaves the socket 7 I have provided a guard or supporting device shown in Fig.4, which may be in the form of a piece of sheet metal bent to lit against the outer surfaces of the cylindrical portion of the extension and the outer surface of the insulated lead. As shown, the member 16 is formed with a slot. at one end to receive the set screws l-l. After the lead is secured in the socket with the guard in place the whole is taped together. As a result, the end of the lead, the guard 16 and the terminal form a substantially rigid structure, and the jarring oi the motor or similar causes, will not cause the lead to be given sharp bends where it leaves the portion 6. The insulating jacket 15 prevents the jarring of the motor from injuring the cable by giving it sharp bends beyond the outer end of the support 16.

In the construction shown in Fig. 5 a terminal member 4 is employed which is: :ubstantially similar to the terminal member -it just described, exce pt that it is provided with integral extensions 17 from the socketied cylindrical portion 6 each of which may be substantially similar in shape to the guard or support 16 and may perform the same function. Each terminal is provided with two extensions l7, since in some iiistances it is desired to bringthe cable away from one end of the cylindrical portion oi the terminals, and in other cases from the other end.

In order to make terminals interchangeable the I flanges 5 are made similar and are each provided with holes to receive rivets 8 in order that the extension 9 may secured to either flange as desired.

Each 01' the forms of my invention disclosed have been found reliable and successful in actual practice on a commercial scale.

The form shown in Figs. 1 to 4 inclusive, possesses the advantage that the support can be applied readily to motors already in service without disturbing the strucaisre of re field coils.

It will be apparentthat changes may be me. de in the form of my invention. W ;liout departing from its spirit, and I do not intend that the claiins'hereinaiter made shall be limiteci to'tho specific forms disclosed more than is made necessary by the state of the art.

What I claim asncw and desire to secure by Letters Patent of the United States, is:

1. In a railwauinotor, a field coil, a terminal member secured thereto. said terminal member being formed With a socket. a terminal conductor or lead provided with an insulating; jacket surrounding; its body portion but having 3-:. In combination, a field coil having; permanently so.

cured thereto a terminaLmemher provided Will] a or n- (lrical portion having: an axially extending socket formed in it. a lead in the form of a conductor surrounded by an insulating jacket and having one and bare, with the harm! eeseor lead.

In combination, a field coil having secured thereto a terminal member provided with a socketed porrion. a lead in the form of a conductor. a pol'i'ion of which is sur rounded by an insulating jacket and another portion bare and secured in said socket. and a guard or support secured to said terminal. and eng: in;- the insulated portion of said lead. said guardand-insulated portion being taped together.

i. In combination. a field coil having secure thereto a erminal member provided with n sockeled pm I a lead in the form of a conductor, a portion of Which is surrounded hy an insulating jacket and another portion bare and secured in said socket. and a guard or support secured. to said terminal and engaging the insulated portion of said lead. said guard having;- a'portion oi" its surface curved to ill against the outer surf. c of the lead.

In witness whereof I have hereunto set my hand this 13th day of Oct. 1905.

EDVIN W. ULIJS.

Witnesses l-im'ur 4. l-llSI'sToN, l". (f. STU-1mm.

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